Dark Matter? Where?, page 1
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Topic started on 6-3-2009 @ 11:18 AM by Daisy-Lola
A theory is knocking around saying that 20% of the universe is made up of an exotic substance called 'Dark Matter', whilst a whopping 70% is Dark Energy and only 10% visible (these figures are no doubt being scrutinised and will be corrected shortly by a helpful member).

Could this theory be true?

A fifth of the universe is made of something we cant see and dont know where it is?
To me, this does not sound plausible, and suggests a problem not with the theory of Dark Matter itself, but with the calculations that gave birth to it.

Basically, as is my understanding, Dark Matter, is what happens when you add theory a with theory b, sprinkle with some other theories and serve with a side salad of theory x. Sorry for sounding disbelieving in all this, but its only when you see how many theories actually go into its existence that you start to realise, they're still theories, some partially proven, some not, some still being researched.

Theories are constantly being altered, adjusted, trimmed, revised, added to, and before they are proven sound, they're being used to substantiate other theories, backing them up. Then another theory is being built on the last, whilst the first are being tweaked and fiddled with.

With such mind numbing mathematics and figures being used, how certain are we of the house of cards we've built of having a firm base?

If one theory is proved wrong or 'inaccurate' does someone go around and re-write all other theories that are linked to that? I don't think they do.


reply posted on 6-3-2009 @ 11:50 AM by LSDeviant
reply to post by Daisy-Lola



You cannot see dark matter, but its location is absolutely knowable. Observations can be made of a phenomena called 'gravitational lensing'. Basically, something is bending light where nothing apparently is, causing the stars 'behind' this something to appear to shift in brightness. This happens because dark matter has mass, and thus produces gravity. Here's a link.

Linky


reply posted on 6-3-2009 @ 12:08 PM by Pimpish
reply to post by Daisy-Lola



A fifth of the universe is made of something we cant see and dont know where it is?


I'm not sure that would be too much of a surprise really, if you look at the spectrum of light that the human eye can see. I think as technology keeps progressing, more and more of these questions will be answered.

I wish I knew more about astronomy, there is definitely tons of interesting stuff happening out there.


reply posted on 7-3-2009 @ 11:16 PM by virgthevoice
these kinds of questions are why I've starting studying sciences again (at the ripe old age of 44 - good number, 44, if you're into numerology at all, but that's a WHOLE other topic, and I sideline here)

I remember hearing that

1. there are mathematically either 10 or 11 dimensions (we live in 4 - 3 spatial, 1 is time) - the jury is still out on that one

2. atoms are mostly "empty space", and we can only deal with electrons in probabilities - they are dual in nature, having both particle-like (mass, for e.g.) and wave-like (constructive/destructive interference, for e.g.) properties

in other words, as my last term chemistry prof. said, "we really don't know what electrons are" ... everything is just theories, in fact, what I would call hypotheses, as they are not (and so far cannot be) proven

this kind of makes me feel like and also like

so I wonder if this dark matter is all these other dimensions, the ones we can't see. if you've ever seen Carl Sagan's flatland analogy, it's about viewing 3 physical dimensions from a 4th, higher, dimension. a being in that 4th physical dimension could easily see all of our 3rd physical dimension, but we, being "stuck" in the dimensions we can experience, can't actually see or experience that 4th physical dimension. was quite the awakening for me.

so these higher dimensions... they must be "somewhere" right? and it seems that everything proven mathematically, if it is actually proven and not fuddled with, turns out to be true - the laws we know have all been derived mathematically. (God I love math)

so I don't find the idea of dark matter to be a fantastical idea, and if the math doesn't work, then they just haven't found the real, elegant, solution yet. and yes, if one of the components of the formula fails, then the rest has to be reworked. it doesn't mean the basic precept doesn't have some merit.

for anyone who wants to watch it.. here's that Carl Sagan flatland analogy



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